| 摘要 |
PROBLEM TO BE SOLVED: To prevent cracks from being generated in a connection part of a main beam and a cross member with a height lower than the main beam, by avoiding abrupt change in a cross section of the connection part.SOLUTION: A pair of main beams 37 are provided in a longitudinal direction of rear face of a deck plate 36 of a floor member 31 in a load box of a dump trailer with an internal width approximately corresponding to a width of a chassis frame, and a plurality of cross members 38 with height lower than the main beams 37 between the pair of main beams 37 are provided in a longitudinal direction, with intervals. Reinforcement ribs 39 each with a cross section of L character shape are provided over respective right and left end parts of the cross members 38, and the main beams 37, respectively. A conveyer belt which supports the cross members 38 through the reinforcement ribs 39 is provided on an upper face of the chassis frame. |
